A Cyclic Steam Injection Model for Gas Production from a Hydrate Reservoir
Titel:
A Cyclic Steam Injection Model for Gas Production from a Hydrate Reservoir
Auteur:
Ceyhan, Nuray Parlaktuna, Mahmut
Verschenen in:
Energy sources. Part A, Recovery utilization and environmental effects
Paginering:
Jaargang 23 (2001) nr. 5 pagina's 437-447
Jaar:
2001-06-01
Inhoud:
Thermally efficient production of natural gas from a hydrate reservoir by the use of cyclic steam injection process was modeled. The model was considered as a three-phase process: an injection phase, a soak phase, and a production phase. Using energy and mass balances, heat transfer equations, and steam properties, wellbore heat losses, heat losses to base and cap rock, and heat losses during dissociation were calculated. The radial advance of the hydrate front was tracked during each cycle. The produced gas volume and combustible energy of this gas were compared with the energy of the injected steam to compute energy efficiency of the process. To determine the best possible conditions for gas production from a hydrate reservoir by cyclic injection, the model was tested for a wide range of parameters. Overall thermal efficiency was calculated for different reservoir porosity, reservoir depth, hydrate zone thickness, heat injection rate, and steam injection temperature.
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